Nondispersive Two-Electron Wave Packets in a Helium Atom

Journal Article · Fri Sep 02 00:00:00 EDT 2005 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.95.103001· OSTI ID:20699392

Kalinski, Matt; Hansen, Loren; Farrelly, David ^[1]

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1. Department of Chemistry and Biochemistry, Utah State University, Logan, Utah 84322-0300 (United States)

We demonstrate the existence of stable nondispersing two-electron wave packets in the helium atom in combined magnetic and circularly polarized microwave fields. These packets follow circular orbits and we show that they can also exist in quantum dots. Classically the two electrons follow trajectories which resemble orbits discovered by Langmuir and which were used in attempts at a Bohr-like quantization of the helium atom. Eigenvalues of a generalized Hessian matrix are computed to investigate the classical stability of these states. Diffusion Monte Carlo simulations demonstrate the quantum stability of these two-electron wave packets in the helium atom and quantum-dot helium with an impurity center.

• OSTI ID: 20699392
• Journal Information: Physical Review Letters, Vol. 95, Issue 10; Other Information: DOI: 10.1103/PhysRevLett.95.103001; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ATOMS
COMPUTERIZED SIMULATION
EIGENVALUES
ELECTRONS
HELIUM
MONTE CARLO METHOD
ORBITS
QUANTIZATION
QUANTUM DOTS
STABILITY
TRAJECTORIES
WAVE PACKETS